有关下面等高线地形图中，说法不正确的是（ ）。
Mary is a student. She enjoys ____(run). Every morning, she starts to run near her home____ (介词) six o'clock. She also ____ (like) ball games. After school, she ____ (join) her classmates to play basketball. She ____ (eat) well too. She has three ____ (meal) at school. Her favourite food is ____(dumpling). But the dining hall is small with only ten ____ (table). The students are always ____(wait) there. Now it's time for dinner. Mary is ____ (walk) to the dining hall.
现定义运算“★”，对于任意实数a、b，都有a★b=a2-3a+b，如：4★5=42-3×4+5，若x★2=6，则实数x的值是（ ）
____人．
